Confluence Retirement

Due to the feedback from stakeholders and our commitment to not adversely impact USGS science activities that Confluence supports, we are extending the migration deadline to January 2023.

In an effort to consolidate USGS hosted Wikis, myUSGS’ Confluence service is targeted for retirement. The official USGS Wiki and collaboration space is now SharePoint. Please migrate existing spaces and content to the SharePoint platform and remove it from Confluence at your earliest convenience. If you need any additional information or have any concerns about this change, please contact Thank you for your prompt attention to this matter.
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Comment: Added information about upcoming January Public Meeting.


The Federal Interagency Committee for the Management of Noxious and Exotic weeds (FICMNEW) represents an unprecedented formal partnership between 18 federal agencies with direct invasive plant management and regulatory responsibilities spanning across the United States and territories. FICMNEW was established through a Memorandum of Understanding signed by agency leadership in 1994 and 1997. It is currently co-chaired by USDADOI-NIFA NPS (Bob NowierskiTerri Hogan) and DOI-BLM (Gina RamosDOE (Eric Bradley).

During monthly quarterly open meetings, FICMNEW members interact on important national and regional invasive plant issues and share information with various public and private organizations participating with the federal sector to address invasive plant issues.


FICMNEW continues to bridge the gap between federal agency invasive plant management and science activities and has been a driving force behind the national emphasis against the broader invasive species threat.

Wednesday, March 27th

2:30 PM ET


Next Open Meeting

(next open meeting will be held May 29th, 2:30 PM; details TBD)


(Presentations Past presentations can be downloaded here)



Meeting Location & Call-in Information

Recent Detection and Spread of a new type of Trapa, an Invasive Aquatic Plant, in the Potomac River Watershed

A review of the information obtained from 2014 to 2018 on a new type of non-native water chestnut spreading in Virginia. How do we better reach out to stakeholders to inform them and encourage them to stop the spread of Trapa bispinosa? Are you aware of an existing federal or municipal program  or a case study of the use of EDRR for species  that threaten landscapes and aquatic areas?

Dr. Nancy Rybicki, USGS emeritus aquatic plant ecologist

In the past Dr. Rybicki conducted long term research projects on the increase of submersed aquatic vegetation abundance and diversity in the freshwater, tidal Potomac River during a time interval when water quality improved.  Her education was in Environmental Science and she is an affiliate professor at George Mason University.

This plant is a non-native floating aquatic plant that was discovered in 2014 in the Potomac River watershed and has been spreading rapidly since. Currently, it is reported and verified to occur in small colonies in about 30 water bodies, mostly ponds, in several northern Virginia counties (see the USGS NAS database for more information). Immediate action is needed to control this plant before it expands throughout the watershed and causes significant ecologicaleconomic and recreational impacts. 

Related publication:

Cryptic introduction of water chestnut (Trapa) in the northeastern United States

Chorak et al. 2019, Aquatic Botany 155:32-37, January 27, 2022

1:00 pm EST/11:00 am MDT

INHABIT: a web application to deliver habitat suitability models and bridge the scientist-practitioner divide

Many practitioners are hampered by the scope of the invasive species problem compared to available resources to combat invasive species. Habitat suitability models of invaders can inform watch lists and target population searches, but there is often a divide between researchers creating these models and practitioners who utilize them. We have formed a scientist-practitioner partnership to create suitability models for priority species that are integrated into the Invasive Species Habitat Tool (INHABIT;, a web application displaying visual and statistical summaries of habitat suitability models for >140 terrestrial plant species across the conterminous US. The models are based on aggregated occurrence data and a species-specific set of predictors from a library of environmental predictors we have assembled. Managers provide feedback both on the models and INHABIT’s features, iteratively improving the content and functionality of INHABIT. The first iteration species models have been updated to a new version using the latest occurrence information and an improved predictor set based on feedback from practitioners. The web application is designed to provide practical information leading to enhanced land management actions, including mapped products, information on modeled environmental relationships, and tabular summaries comparing risk among species within a given management unit, as well as comparisons across management units for a given species. INHABIT is actively evolving to help bridge the gap between scientists and practitioners, moving beyond occurrence models to abundance and assessing the geographic distribution of control tools such as biocontrol agents.

The presentation will be followed by a round-robin of attendees to share our work and needs and identify areas of intersection among participants.

Catherine Jarnevich is a research ecologist with USGS, where she has worked for many years exploring the distributions of species. Much of her current research involves the application of habitat suitability models to answer different applied research and management questions for various species across a range of taxa and spatial scales.

Peder Engelstad is a spatial data scientist who contributes to several research projects with his expertise in statistical modeling and programming. Recently, he has been collaborating with researchers at USGS to harness the power of high-performance computing systems to map the distribution of invasive plant species and is dedicated to finding effective ways of communicating those data to agency scientists and land managers.

Call in instructions have been sent via email. Please contact if you would like to participate and did not receive call in information.

MOU's (memoranda of understanding)

Charter (2008) (pdf)


FICMNEW fact sheet (


2019 draft) (pdf)

History - based on information provided by Bonnie Harper-Lore